GRAPHICS: Add support for normals in Models
GRAPHICS: Add ModelNode::calculateNormals()
GRAPHICS: Read/Calculate NWN model normals
GRAPHICS: Read/Calculate KotOR model normals
GRAPHICS: Add ModelNode::getWorldPosition()
GRAPHICS: Add Model::getCenter() and Model::getAbsoluteCenter()
GRAPICS: Add a LightManager
NWN: Switch on lighting (WIP!)

Horribly wrong and broken in several places.
Also, very very slow.